/**
 * $Id$
 * $Date$
 *
 */

package org.xmlsh.core;

import java.net.URL;
import java.util.List;
import org.xmlsh.sh.module.RootModule;
import org.xmlsh.sh.shell.Shell;
import org.xmlsh.sh.shell.ShellConstants;
import org.xmlsh.xpath.ThreadLocalShell;

public abstract class XCommand extends AbstractCommand {

  public XCommand() {
    super(RootModule.getInstance());
  }

  protected void throwInvalidArg(String string)
      throws InvalidArgumentException {
    printErr(string);
    throw new InvalidArgumentException(string);

  }

  @Override
  public String getName() {
    String name = getClass().getSimpleName();
    if(name.lastIndexOf(ShellConstants.kDOT_CHAR) > 0) {
      name = name.substring(name.lastIndexOf(ShellConstants.kDOT_CHAR) + 1);
    }

    /*
     * Convert from camelCase to hyphen-case
     */

    return fromCamelCase(name);
  }

  private String fromCamelCase(String name) {
    StringBuffer result = new StringBuffer(name.length() + 5);

    for(char c : name.toCharArray()) {
      if(Character.isUpperCase(c)) {
        result.append('-');
        result.append(Character.toLowerCase(c));
      }
      else
        result.append(c);

    }

    return result.toString();

  }


    /* (non-Javadoc)
     * @see org.xmlsh.core.ICommand#run(org.xmlsh.sh.shell.Shell, java.lang.String[])
     */
    @Override
    public int run(Shell shell, String cmd, List<XValue> args) throws Exception
    {
        Shell saved_shell = ThreadLocalShell.set(shell);


        try {
            return run(  args , shell.getEnv() );
        }
        catch( UnknownOption e )
        {
            error( e);
            return -1;
        }



        finally{
            ThreadLocalShell.set(saved_shell);
        }

    }

  public abstract int run(List<XValue> args) throws Exception ;

  public int run(List<XValue> args, XEnvironment env) throws Exception {
    mEnvironment = env;
    mShell = env.getShell();
    return run(args);

  }

  /*
   * (non-Javadoc)
   * 
   * @see org.xmlsh.core.ICommand#getType()
   */
  @Override
  public CommandType getType() {
    return CommandType.CMD_TYPE_INTERNAL;
  }

  @Override
  public URL getURL() {
    // TODO Auto-generated method stub
    return null;
  }

}
//
//
// Copyright (C) 2008-2014 David A. Lee.
//
// The contents of this file are subject to the "Simplified BSD License" (the
// "License");
// you may not use this file except in compliance with the License. You may
// obtain a copy of the
// License at http://www.opensource.org/licenses/bsd-license.php
//
// Software distributed under the License is distributed on an "AS IS" basis,
// WITHOUT WARRANTY OF ANY KIND, either express or implied.
// See the License for the specific language governing rights and limitations
// under the License.
//
// The Original Code is: all this file.
//
// The Initial Developer of the Original Code is David A. Lee
//
// Portions created by (your name) are Copyright (C) (your legal entity). All
// Rights Reserved.
//
// Contributor(s): none.
//